Dielectric Resonators and Dielectric Materials (TE)

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Dielectric Resonators & Materials (TE)

Microwave dielectric resonator material is the cornerstone of future communications technology (TE01δ Mode). Microwave dielectric ceramics as the key basic materials to modern communication technology, after DeMint Electronics years of continuous research and development, using the latest technology to produce microwave ceramics have achieved a variety of dielectric constant, quality factor Q of the new media ceramic materials, and as a dielectric material application microwave frequencies of modern circuits, and modern electronic communications in the filters, resonators, dielectric substrates, such as microwave dielectric waveguide circuit components materials.

Comparing with microwave dielectric components made of DeMint's ceramic materials and metal cavity resonator, obviously, DeMint dielectric resonator features with a light weight, small volume, temperature coefficient of stability, cheap, and so on. They have been widely used in satellite broadcast reception systems, PCS / PCN filters, base stations, radar detectors, wireless mobile communications, telecommunications computer systems, military facilities, microwave, modern medicine and many other areas.

Taking advantage of DeMint's microwave dielectric ceramic materials for dielectric filters and resonators, with a relatively high dielectric constant, can make the device smaller, space-saving design of the circuit; high quality factor Q value and low dielectric loss, in order to ensure a good selection frequency characteristics and low insertion loss of the device; the temperature coefficient is small, in order to ensure the thermal stability of the device. Dielectric constant, quality factor Q, the temperature coefficient, these three parameters to evaluate the important microwave dielectric ceramic material specifications and production.

Custom parts are available on request. DeMint will also produce devices outside these specifications to meet specific customer requirements,
please contact our sales for more information. Download (TE01δ Mode) Datasheet PDF (366KB).

Features :

High Q Value.
Easy to control τ f.
Various dielectric constant materials.

Applications :

Police Radar Detectors.
Dielectric Resonator Antennas.
LMDS/MMDS Wireless Cable TV.
Automobile Collision Avoidance Sensors.
LNB, PCS/PCN Filters, Duplexer & Combiners.
Cellular Base Station Filter, Duplexer & Combiners.

Application Notice TE01δ Mode (TE)

Aging :
Ceramics aging is small. Microwave Dielectric Ceramics any change in resonant frequency can be attributed to changes in measurement cavity or measurement techniques.
Water Absorbing :
Ceramics absorb water is not obvious, but the moisture condensation in the ceramic microwave resonator on the surface will affect the Q_u. But Q_u will be self-healing, when the water dried, For example, Dielectric resonator in the filter operation of the self-heating.
Cleanliness :
Q_u degradation of the oil may be due to a finger, pencil lead note, tape, adhesives, or other contaminants. Cleanliness of the dielectric ceramics is important.
Dielectric Constant :
In fact, the microwave dielectric ceramics of the dielectric constant is not fixed. It varies with the additives added, and used to determine the temperature coefficient ceramics. The dielectric constant of each batch is slightly different and it changes slightly with temperature changes. DeMint compensates for these effects and provide resonators size to frequency, and offers custom temperature coefficient on request.
Dielectric loss factor tanδ & Q_u :
Dielectric loss factor and quality factor of the relationship, such as Quality Factor (Q = 1 / tanδ), Dielectric microwave materials are commonly assigned a loss tangent to permit an estimate of signal losses. Ceramic resonator is usually run on a specific frequency, a specific geometric shape, it can directly measure its size, with no-load quality factor Q_u, Q_u is an important basic resonator parameters (more useful than the loss tangent), particularly suitable filter and oscillator applications.
Smooth Surfaces :
Ceramic hard surface contact, it is prone to very small fragments. Most of the small fragments will not affect the electrical properties of dielectric ceramics. Ceramic surface roughness is not particularly important factor. Ceramic resonator itself does not current exist only in the form of stored energy from the field. Smooth surfaces are desirable from the standpoint of avoiding trapped contaminants.
Thermal Shock :
Microwave dielectric ceramics in the temperature exceeds 1200° in furnace to burn out, they can be more resistant than the temperature of electronic devices, far beyond the welding temperature. However, the thermal conduction velocity of dielectric ceramics is much slower than the metal. Large temperature gradient through the ceramic device, because of uneven expansion, could lead to device failure, which is called thermal shock. Suddenly applied heat in the thick ceramic devices will lead to broken ceramics.
Adhesives :
Adhesives to install ceramic resonators must be carefully selected. Adhesives will reduce the dielectric ceramics Q _u, The right adhesives can reduce Q_u to a minimum, while ensuring the adhesion strength.

Available Range by Every Material TE01δ Mode (TE)
Material Series	Dielectric Constant	Fo Q(1/tanδ)	Temperature Coefficient (PPM/°C)	Insulation Resistance (Ω-cm)	Application Frequency Range	Application Range
TE21	19~22	6,000@10GHz	0 ± 3	>10¹⁴	Refer Frequency Chat	Refer Frequency Chat
TE30	29~30	15,000@10GHz	0 ± 6	>10¹⁴
TE36	35~37	10,000@4GHz	0 ± 3	>10¹⁴
TE45	44~46	10,000@4GHz	0 ± 6	>10¹⁴
TE80	79~81	7,000@1GHz	0 ± 6	>10¹⁴
TE90	89~91	7,000@1GHz	0 ± 6	>10¹⁴

Dielectric Resonators & Materials (TE)

TE01δ Mode (TE) Frequency Chart

Application Notice TE01δ Mode (TE)